All-in-one desktop computers from Apple. iMacs have been equipped with Intel processors since January 2006.

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20" iMac Power Supply differences

I have an early 2009 iMac with a blown power supply, it actually threw sparks. I am looking for replacements, the part is 661-4987. It is not a cheap part. In looking around I see the 661-4433, 661-4670. They are cheaper, on ebay at least. all are rated 180w, have same plug design, are visually the same layout/component location. Does anyone know of differences between them. thanks

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I don't know for sure on this, but today I switched out the LCD on the 24" 2009 iMac for the 24" 2007 iMac and it worked just fine. here's the question on that switch: Why does my screen have ~3/4" brownish shading on both sides?

I looked at the specs on both power supplies and see no problem in switching them. I'd give it a try.

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Thanks. I think I'll be doing it. Just wanted to see if someone had more insight than me. I do component level board repairs all of the time and do have a deep understanding of electronics. i just have to question this especially when the cost differs by $100.


The cost difference on the LCDs was $300 more for the 2009. I just order the 2007 model.


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